204 



Teredo inillifoniiis Miller (11)24). Figure 7^. 



Shell. Auricle much reduced, and so fused with the posterior median portion that the boundary 

 between the two can scarcely be detected on the exterior surface. Interiorly the auricle overlaps the 

 posterior median portion a little distance, and its anterior edge can be distinguished, liut does not form 

 a shelf with a cavity behind it as it does in all of the foregoing species. 



Palliis. With short, broad blade; stalk of medium length, which, instead of tapering gradualK- 

 toward the end, fiecomes slightly expanded, like the handle of a trowel (Latin India). The distal portion 

 of the blade is covered by a grayish or brownish epidermis, and the extremity is characterized by a 

 shallow crescent shaped excavation. 



Fig. 75. Pallets and siphons ol Baiikia siiacea. Magnified slightly. 



The posterior end of the tube is divided by a calcareous partition, forming two siphonal openings. 

 The blades of the pallets are at right angles to this partition. 



Type. No. 1731, Museum of the California ."Xcademy of Sciences, San Francisco; from Honolulu 

 Harbor. 



Distrihulion. Thus far known from Hawaiian Islands onh'. 



